<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const p1 = new Promise((resolve, reject) => {
            setTimeout(()=>{
                resolve("获取用户")
            },1000)
        })
        const p2 = new Promise((resolve, reject) => {
            setTimeout(()=>{
                resolve("获取角色")
            },1200)
        })
        const p3 = new Promise((resolve, reject) => {
            setTimeout(()=>{
                reject("获取权限")
            },1500)
        })

        const p = Promise.all([p1,p2,p3])
        p.then(res=>{
            console.log("res",res);
        }).catch(error=>{
            console.log("error",error);
        })

    </script>
</body>

</html>